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Sputtering processed highly efficient Cu2ZnSn(S,Se)4 solar cells by a low-cost, simple, environmentally friendly, and up-scalable strategy

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Title
Sputtering processed highly efficient Cu2ZnSn(S,Se)4 solar cells by a low-cost, simple, environmentally friendly, and up-scalable strategy
Author(s)
Gang M.G.; Seung Wook Shin; Hong C.W.; Gurav K.V.; Gwak J.; Yun J.H.; Jeong Yong Lee; Kim J.H.
Publication Date
2016-02
Journal
GREEN CHEMISTRY, v.18, no.3, pp.700 - 711
Publisher
ROYAL SOC CHEMISTRY
Abstract
Earth abundant copper-zinc-tin chalcogenide (CZTSSe) is an emerging material for the development of low cost and sustainable thin film solar cells (TFSCs). A low cost, green, and up-scalable approach to the fabrication of TFSCs through a sputtering process is the main challenge to achieve high efficiency for Cu2ZnSn(S,Se)4 (CZTSSe) solar cells for industrialization. Based on a closed isothermal chamber annealing system, we could precisely calculate and control the chalcogenide partial vapour pressure during the annealing process. We designed, developed, and optimized an environmentally friendly strategy to synthesise a high quality CZTSSe absorber thin film and to fabricate a solar cell without using toxic H2Se and H2S gases as the Se and S sources or any other volatile compounds (SnS and Sn), and a chalcogenide diffusion barrier layer. We fabricated a CZTSSe TFSC with 9.24% efficiency, which is the highest performance for sputtering processed CZTSSe TFSC prepared without using toxic gases and additional processes. Based on this green strategy, we also fabricated the integrated submodule using CZTSSe absorber layers with efficiencies as high as η = 2.76% with eight interconnected cells (active area of 22.4 cm2). Our studies on this green synthesis strategy for CZTSSe solar cells could introduce a possible pathway to green fabrication for the low cost and highly efficient TFSC industrialization field. © 2016 The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/2730
ISSN
1463-9262
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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